Long-stroke oil cylinder with lengthened guide sleeve

Abstract

The long-stroke oil cylinder with the lengthened guide sleeve comprises a cylinder barrel, a piston is connected in the cylinder barrel in a sliding mode, a piston rod is arranged on the piston, the piston rod is arranged in an inner cavity of the cylinder barrel in a penetrating mode, and the upper end of the cylinder barrel is connected with the guide sleeve in a threaded mode. According to the long-stroke oil cylinder, the installed guide sleeve is connected with the cylinder barrel in a threaded mode, then the piston rod of the long-stroke oil cylinder can be supported and guided, the arranged air inlet pipe can be connected with external cold air, and the air inlet pipe is led into the spiral heat dissipation pipe to dissipate heat generated by friction of the piston rod; and the arranged dustproof sealing piece can block outside dust, the arranged piston rod sealing piece can seal the piston rod, and the arranged buffering sealing piece can reduce impact and vibration in mechanical movement and prevent hydraulic oil leakage.

Description

TECHNICAL FIELD

[0001] The utility model relates to long stroke oil cylinder technical field, concretely is a long stroke oil cylinder with lengthened guide sleeve. BACKGROUND

[0002] Long stroke oil cylinder is a kind of hydraulic element, long stroke oil cylinder is pushed piston or plunger by the pressure of hydraulic oil, to realize long-distance linear motion, the guide sleeve in long stroke oil cylinder is to guide piston to move stably in cylinder body, prevent piston from swinging or deviating from track in the movement process, to improve the working efficiency and stability of hydraulic system, guide sleeve can effectively improve sealing property and wear resistance, reduce the occurrence of oil leakage.

[0003] The prior art discloses a long-stroke hydraulic oil cylinder, including cylinder barrel, the inner cavity of the cylinder barrel is provided with the first piston rod, the left side of the surface of the first piston rod is provided with the first guide sleeve, the outer surface of the first guide sleeve is in contact with the cylinder barrel, the inner cavity of the first piston rod is provided with the second piston rod, the surface of the second piston rod is provided with the second guide sleeve, the outer surface of the second guide sleeve is in contact with the inner wall of the first piston rod, and the right end of the first piston rod and the right end of the second piston rod are provided with the piston.

[0004] The outer surface of the first guide sleeve is in contact with the cylinder barrel, and when the piston rod is pushed, the heat generated by friction is collected around, and the heat dissipation effect is poor, which affects the service life of the long stroke oil cylinder. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a long stroke oil cylinder with lengthened guide sleeve to solve the problems in the above background.

[0006] To achieve the above object, the utility model provides the following technical scheme: a long stroke oil cylinder with lengthened guide sleeve, including cylinder barrel, the inside of the cylinder barrel is slidably connected with piston, the piston is provided with piston rod, the piston rod is arranged in the inner cavity of the cylinder barrel, and the upper end of the cylinder barrel is threadedly connected with guide sleeve.

[0007] The inner cavity of the guide sleeve is provided with heat dissipation structure, the guide sleeve further includes spiral heat dissipation pipe, the spiral heat dissipation pipe is spirally arranged on the inner side of the guide sleeve, one end above the spiral heat dissipation pipe is provided with air inlet pipe and is arranged out of the guide sleeve, and one end below the spiral heat dissipation pipe is provided with air outlet pipe and is arranged out of the guide sleeve.

[0008] In the technical scheme, the guide sleeve is connected with the cylinder through screw mounting, thereby supporting and guiding the piston rod of the long-stroke oil cylinder, the air inlet pipe is connected with external cold air, and the heat generated by friction of the piston rod is dissipated in the spiral heat dissipation pipe, thereby reducing damage of the long-stroke oil cylinder and prolonging the service life.

[0009] Further preferably, the piston is provided with a piston sealing element above the outer side of the piston and a piston guide ring below the outer side of the piston.

[0010] The piston sealing element can seal the piston.

[0011] Further preferably, the cylinder is provided with a tapered thread positioning hole one at both ends of the upper end of the cylinder, and the outer surface of the cylinder is provided with a plurality of cooling fins arranged in the circumferential direction.

[0012] The cooling fins can dissipate heat inside the cylinder.

[0013] Further preferably, the guide sleeve is provided with a dustproof sealing element at the upper end of the guide sleeve, a piston rod sealing element on the inner wall of the guide sleeve below the dustproof sealing element, a piston rod guide ring on the inner wall of the guide sleeve below the piston rod sealing element, and a buffer sealing element on the inner wall of the guide sleeve below the piston rod guide ring.

[0014] The dustproof sealing element can block dust from the outside, the piston rod sealing element can seal the piston rod, and the buffer sealing element can reduce impact and vibration during mechanical movement and prevent hydraulic oil leakage.

[0015] Further preferably, the guide sleeve is provided with a tapered thread positioning hole two at both ends of the outer surface of the guide sleeve, the tapered thread positioning hole two is provided with an internal thread connected with a tapered thread positioning screw in alignment with the tapered thread positioning hole one.

[0016] When the tapered thread positioning hole two is aligned with the tapered thread positioning hole one, the tapered thread positioning screw is further used for positioning and mounting the guide sleeve.

[0017] Further preferably, the guide sleeve is provided with a sealing ring two at the bottom side of the guide sleeve close to the outer wall of the cylinder, and the outer side of the sealing ring two is in contact with the upper side of the outer surface of the cylinder.

[0018] Further preferably, the guide sleeve is provided with a sealing ring one close to the top side of the cylinder, and the outer side of the sealing ring one is in contact with the top side of the cylinder.

[0019] The sealing ring one and the sealing ring two are further arranged to avoid the leakage of hydraulic oil during installation of the guide sleeve.

[0020] The long-stroke oil cylinder with the lengthened guide sleeve has the following beneficial effects:

[0021] (1) The guide sleeve is connected with the cylinder barrel in a threaded manner, thereby supporting and guiding the piston rod of the long-stroke oil cylinder, the air inlet pipe is connected with external cold air, and the heat generated by friction of the piston rod is dissipated in the spiral heat dissipation pipe, thereby reducing damage to the long-stroke oil cylinder and improving the service life.

[0022] (2) The dustproof sealing element is arranged to block dust from the outside, the piston rod sealing element is arranged to seal the piston rod, the buffer sealing element is arranged to reduce impact and vibration during mechanical movement and prevent hydraulic oil leakage, and the sealing ring one and the sealing ring two are further arranged to avoid the leakage of hydraulic oil during installation of the guide sleeve. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic structural view of the whole utility model;

[0024] Figure 2 It is a sectional view of a part of the utility model;

[0025] Figure 3 It is a schematic structural view of the guide sleeve of the utility model;

[0026] Figure 4 It is a schematic structural view of the cylinder barrel of the utility model;

[0027] Figure 5 It is an enlarged view of the A figure of the utility model;

[0028] Figure 6 It is a schematic structural view of the spiral heat dissipation pipe of the utility model;

[0029] In the figure: 1, cylinder barrel; 11, conical thread positioning hole one; 12, cooling fin; 2, piston; 21, piston sealing element; 22, piston guide ring; 3, piston rod; 4, guide sleeve; 41, dustproof sealing element; 42, piston rod sealing element; 43, piston rod guide ring; 44, buffer sealing element; 45, sealing ring one; 46, sealing ring two; 47, conical thread positioning hole two; 48, conical thread positioning screw; 49, heat dissipation structure; 491, spiral heat dissipation pipe; 492, air inlet pipe; 493, air outlet pipe. DETAILED DESCRIPTION

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0031] This utility model provides a technical solution: such as Figure 1 and Figure 2 As shown in this embodiment, a long-stroke hydraulic cylinder with an extended guide sleeve includes a cylinder barrel 1, a piston 2 slidably connected inside the cylinder barrel 1, a piston rod 3 provided on the piston 2, the piston rod 3 passing through the inner cavity of the cylinder barrel 1, and a guide sleeve 4 threadedly connected to the upper end of the cylinder barrel 1. The guide sleeve 4 is connected to the cylinder barrel 1 by means of threaded installation, thereby supporting and guiding the piston rod of the long-stroke hydraulic cylinder.

[0032] like Figure 4 and Figure 5 As shown, a piston seal 21 is provided on the upper outer side of the piston 2, which can seal the piston 2. A piston guide ring 22 is provided on the lower outer side of the piston 2. Tapered thread positioning holes 11 are provided at both ends of the upper end of the cylinder 1. Heat sinks 12 are arranged in the circumferential direction on the outer surface of the cylinder 1, which can dissipate heat from the inside of the cylinder 1.

[0033] like Figure 3 and Figure 6As shown, the inner cavity of the guide sleeve 4 is provided with a heat dissipation structure 49, the guide sleeve 4 further comprises a spiral heat dissipation pipe 491, the spiral heat dissipation pipe 491 is spirally arranged on the inner side of the guide sleeve 4, the upper end of the spiral heat dissipation pipe 491 is provided with an air inlet pipe 492, and the air inlet pipe 492 is arranged on the outer side of the guide sleeve 4, the lower end of the spiral heat dissipation pipe 491 is provided with an air outlet pipe 493, and the air outlet pipe 493 is arranged on the outer side of the guide sleeve 4, the upper end of the guide sleeve 4 is provided with a dustproof sealing element 41, the inner wall of the guide sleeve 4 and below the dustproof sealing element 41 is provided with a piston rod sealing element 42, the inner wall of the guide sleeve 4 and below the piston rod sealing element 42 is provided with a piston rod guide ring 43, the inner wall of the guide sleeve 4 and below the piston rod guide ring 43 is provided with a buffer sealing element 44, the dustproof sealing element 41 can block the dust from the outside, the piston rod sealing element 42 can seal the piston rod 3, the buffer sealing element 44 can reduce the impact and vibration in mechanical movement, prevent hydraulic oil leakage, the bottom side of the guide sleeve 4 close to the outer wall of the cylinder barrel 1 is provided with a sealing ring two 46, the outer side of the sealing ring two 46 is in contact with the upper side of the outer surface of the cylinder barrel 1, the sealing ring one 45 and the sealing ring two 46 further avoid the leakage of hydraulic oil during the installation of the guide sleeve 4, the top side of the guide sleeve 4 is provided with a sealing ring one 45, the outer side of the sealing ring one 45 is in contact with the top side of the cylinder barrel 1, the outer surface of both ends of the guide sleeve 4 is provided with a tapered thread positioning hole two 47, the tapered thread positioning hole two 47 is aligned with the tapered thread positioning hole one 11 and is internally screwed with a tapered thread positioning screw 48, when the tapered thread positioning hole two 47 is aligned with the tapered thread positioning hole one 11, the tapered thread positioning screw 48 is further used for positioning and installing the guide sleeve 4, the air inlet pipe 492 can be connected with external cold air, and the heat generated by the friction of the piston rod 3 can be dissipated in the spiral heat dissipation pipe 491, so as to reduce the damage of the long-stroke oil cylinder and prolong the service life, and the sealing element is made of rubber.

[0034] The utility model provides a long -stroke oil cylinder with lengthened guide sleeve, concrete working principle is as follows: guide sleeve 4 adopts the installation mode of thread and is connected with the upper end of cylinder barrel 1, the leakage of hydraulic oil during the installation of guide sleeve 4 is avoided by the sealing ring one 45 and the sealing ring two 46 of setting of setting after being connected, the dustproof sealing element 41 can block the dust from the outside, the piston rod sealing element 42 can seal the piston rod 3, the buffer sealing element 44 can reduce the impact and vibration in mechanical movement, prevent hydraulic oil leakage, the piston rod 3 penetrates the inner cavity of cylinder barrel 1, the heat generated during work can be connected with air inlet pipe 492 through external cold air equipment, the heat can be taken out through flow, and is discharged from air outlet pipe 493, and the fin 12 arranged on the outer surface of cylinder barrel 1 further dissipates heat.

[0035] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A long-stroke oil cylinder with an elongated guide sleeve, comprising a cylinder barrel (1), characterized in that: The cylinder (1) is slidably connected with a piston (2) inside, the piston (2) is provided with a piston rod (3), the piston rod (3) is arranged in the inner cavity of the cylinder (1), the upper end of the cylinder (1) is threadedly connected with a guide sleeve (4); The guide sleeve (4) is provided with a heat dissipation structure (49) in the inner cavity, the guide sleeve (4) further comprises a spiral heat dissipation pipe (491), the spiral heat dissipation pipe (491) is spirally arranged on the inner side of the guide sleeve (4), the upper end of the spiral heat dissipation pipe (491) is provided with an air inlet pipe (492) and penetrates out of the guide sleeve (4), the lower end of the spiral heat dissipation pipe (491) is provided with an air outlet pipe (493) and penetrates out of the guide sleeve (4).

2. The long stroke oil cylinder with an elongated guide sleeve according to claim 1, characterized in that: The upper side of the outer side of the piston (2) is provided with a piston sealing element (21), and the lower side of the outer side of the piston (2) is provided with a piston guide ring (22).

3. The long stroke oil cylinder with an elongated guide sleeve according to claim 1, characterized in that: The upper end of the cylinder (1) is provided with a tapered thread positioning hole one (11) at both ends, and the outer surface of the cylinder (1) is arranged with a plurality of cooling fins (12) in the circumferential direction.

4. The long stroke oil cylinder with an elongated guide sleeve according to claim 1, characterized in that: The upper end of the guide sleeve (4) is provided with a dustproof sealing element (41), the inner wall of the guide sleeve (4) and below the dustproof sealing element (41) is provided with a piston rod sealing element (42), the inner wall of the guide sleeve (4) and below the piston rod sealing element (42) is provided with a piston rod guide ring (43), and the inner wall of the guide sleeve (4) and below the piston rod guide ring (43) is provided with a buffer sealing element (44).

5. The long stroke oil cylinder with an elongated guide sleeve according to claim 1, characterized in that: The outer surfaces of both ends of the guide sleeve (4) are provided with tapered thread positioning holes two (47), the tapered thread positioning holes two (47) are arranged in alignment with the tapered thread positioning holes one (11), and the tapered thread positioning holes two (47) are internally threadedly connected with tapered thread positioning screws (48).

6. The long stroke oil cylinder with an elongated guide sleeve according to claim 1, characterized in that: The bottom side of the guide sleeve (4) close to the outer wall of the cylinder (1) is provided with a sealing ring two (46), and the outer side of the sealing ring two (46) is in contact with the upper side of the outer surface of the cylinder (1).

7. The long stroke oil cylinder with an elongated guide sleeve according to claim 1, characterized in that: The guide sleeve (4) close to the top side of the cylinder (1) is provided with a sealing ring one (45), and the outer side of the sealing ring one (45) is in contact with the top side of the cylinder (1).

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